Wow! I just went through this thread last night. What an undertaking! I've thought about attempting this myself with my 69 LWB. I could probably do the work but finding the time and money is my problem. I thought about just swapping my body over to a later model chassis, but I just don't know if I could dedicate myself to the extent you have. I have to say, for someone who doesn't do this for a living, you have a lot of skill. Maybe you should consider a new line of work. I am definitely impressed and I will be keeping up with your project. Thanks for posting all this info. Maybe it will inspire me.
